CN106521811A - Two-component gradient structure non-woven fabric for water filtering and preparation method and application thereof - Google Patents
Two-component gradient structure non-woven fabric for water filtering and preparation method and application thereof Download PDFInfo
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- CN106521811A CN106521811A CN201611110671.9A CN201611110671A CN106521811A CN 106521811 A CN106521811 A CN 106521811A CN 201611110671 A CN201611110671 A CN 201611110671A CN 106521811 A CN106521811 A CN 106521811A
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- fibre web
- copet
- pet
- ground floor
- weaving cloth
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/009—Condensation or reaction polymers
- D04H3/011—Polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
- B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
- B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/018—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the shape
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
Abstract
The invention discloses a two-component gradient structure non-woven fabric for water filtering and a preparation method thereof. The non-woven fabric is composed of a first-layer fiber web and a second-layer fiber web which are bonded together, wherein the first-layer fiber web and the second-layer fiber web are each composed of trefoil PET filament fibers and circular COPET filament fibers which have different finenesses. The preparation method comprises the steps that PET slices and COPET slices which are subjected to pre-crystallization are fully dried; fusion overstocking, spinning, cooling, drafting and separation lapping are conducted through two groups of different spinning assemblies, then the obtained two layers of fiber webs are overlapped to form a composite fiber web, and finally the composite fiber web is subjected to hot air bonding and melting to be reinforced into a whole. According to the two-component gradient structure non-woven fabric for water filtering, the advantages of different fineness filtering in a filter material can be fully exerted, the filtering efficiency is guaranteed, the service life is effectively prolonged, and pressure drop is controlled within a reasonable range; accordingly, the non-woven fabric has the advantages of being free of rolling points, high in ventilation property and filtering precision, low in pressure drop and long in service life.
Description
Technical field
The present invention relates to Nonwovens In Technology field, specifically a kind of water filtration bi-component gradient-structure non-weaving cloth
And its preparation method and application.
Background technology
Terylene non-weaving cloth is made up of polyester filament fiber hot melt adhesive, in adhesion process by itself it is fusible conjunction and
Tangle, form the three-dimensional micropore structure of random disordered arrangements in space, be mainly used as filtering material, the filtering material mainly passes through
Effect between fiber between aperture and ultimate fibre and granule, i.e., when liquid is passed through, larger particles can be by interfibrous aperture blockage
Deposition, smaller particle with liquid run into fiber occur flow direction transformation, granule self gravitation and liquid flow direction change in the presence of,
Played a role in filtering by the surface that fiber capturing further sticks to fibrous material.
Terylene circular shaped filaments fiber being selected current non-weaving cloth, when filtering, most of granule is intercepted at filtering layer more
Surface, and surface void is easy to be filled and its internal voids is not utilized effectively, the pressure in filter process
Strong rapid rising so that filter material can not play one's part to the full, and service life is short.Additionally, the fibre structure of circle is determined
Filter efficiency and pressure drop can not get both, and be in particular in：First, in unit volume, more fiber alignment, can cause fiber
Between space it is less, filter efficiency is higher, but the pressure drop inevitably rapid increase in filter process, reduces material
Service life；Second, it is slower that pressure drop rises, and shows that the hole of material internal is bigger, and service life is longer, but unit area
The fiber for inside rearranging is also fewer, and filter efficiency is lower.And at present nonwoven filter mostly with the terylene for rolling a little without
Cloth is spun, the fibers melt in a little is rolled and can be played a part of viscose fibre, but the fiber after melting is completely plugged by duct, reduces
The filter area of non-weaving cloth filter material.Therefore, single terylene circular shaped filaments fiber filter effect and service life are limited, usually
For in the relatively low filtration environment of filtering requirement.
The content of the invention
To solve, existing terylene circular shaped filaments nonwoven filter structure is single, service life is short, pressure drop is big, filtering accuracy
Low deficiency, the invention provides a kind of water filtration bi-component gradient-structure non-weaving cloth and its preparation method and application.
The present invention for achieving the above object, is achieved through the following technical solutions：
A kind of water filtration bi-component gradient-structure non-weaving cloth, it is characterised in that：By the ground floor fibre web that is bonded together and
Second layer fibre web composition, wherein ground floor fibre web and the second layer fibre web trilobal PET filament fiber and circle by different fineness
Shape COPET filament fiber is constituted；The line density of trilobal PET filament fiber be 2 ~ 6D, account for each layer fibre web mass ratio be 70 ~
95%, the line density of circular COPET filament fibers is 1 ~ 4D.
Preferably, aperture is 10 ~ 200 μm, and grammes per square metre is 70 ~ 200g/m2, thickness is 0.3 ~ 1.6mm.
Preferably, the weight ratio that ground floor fibre web accounts for water filtration bi-component gradient-structure non-weaving cloth is 40 ~ 80%.
Preferably, in ground floor fibre web, the line density of trilobal PET filament fiber is more than trilobal PET in second layer fibre web
The line density of filament fiber, in second layer fibre web, the line density of circle COPET filament fibers is more than or equal to circle in second layer fibre web
The line density of shape COPET filament fiber.
It is further preferred that be made up of the ground floor fibre web and second layer fibre web that are bonded together, by what is be bonded together
Ground floor fibre web and second layer fibre web composition, wherein ground floor fibre web are by the trilobal PET filament fiber and line that line density is 3D
Circular COPET filament fiber composition of the density for 1.8D, and trilobal PET filament fiber accounts for the 86% of ground floor web quality；
Second layer fibre web is by the circular COPET filament fibers that the trilobal PET filament fiber and line density that line density is 2.5D is 1.5D
Composition, and trilobal PET filament fiber accounts for the 83% of second layer web quality, and pore diameter range is 10 ~ 200 μm, and grammes per square metre scope is
140g/m2, thickness is 0.55mm, and it is 75% that ground floor fibre web accounts for the weight ratio of water filtration bi-component gradient-structure non-weaving cloth.
Present invention additionally comprises the water filtration preparation method of bi-component gradient-structure non-weaving cloth, comprises the following steps：
1. will be PET and COPET pre-crystallized, it is dried after section, obtains PET sections and COPET cuts into slices；
2. by step 1. gained PET sections and COPET sections by first group of filament spinning component carry out melting overstocked, spinning, cooling,
Traction and sub-wire lapping, obtain ground floor fibre web；
3. by step 1. gained PET sections and COPET sections by second group of filament spinning component carry out melting overstocked, spinning, cooling,
Traction and sub-wire lapping, obtain second layer fibre web；
4. by step 3. gained second layer fibre web be laid in step 2. gained ground floor fibre web on, superposition obtain composite web, so
Composite web is obtained Jing after hot blast adhesion water filtration bi-component gradient-structure non-weaving cloth afterwards；Wherein hot blast temperature exists
Between COPET and the fusing point of PET.
Preferably, the fusing point of PET sections is 260 ~ 265 DEG C, and the fusing point of COPET sections is 160 ~ 240 DEG C.
Preferably, the temperature of hot blast adhesion is 160 ~ 255 DEG C.
The invention also discloses application of the water filtration with bi-component gradient-structure non-weaving cloth, fixed through impressing, glued heat
Tubular or flat liquid filter cartridge are made after type.
The present invention has advantages below compared to existing technology：
The non-weaving cloth of the present invention is made using fineness different PET and COPET, and gradient is more, thickness is big；The non-weaving cloth foundation
The characteristic of fiber, multiple structures different with aperture fibrous layers is combined, and thicker and fluffy fiber can be in surface of filter medium
Larger aperture is formed, with absorbed portion bulky grain, and little particle can be entered inside filter material, inside filter material, thinner fiber
The aperture formed in banking process is all less, can effectively filter molecule；And the larger thickness of material is caused in filter material
The fiber in portion fully can be caught to granule, and the design of so many gradient-structures can give full play to different fineness inside filter material
The advantage of filtration, it is ensured that filter efficiency, effectively increases the service life, and by the control of pressure drop in the reasonable scope；Therefore this
Bright non-weaving cloth have it is non-roll that point, Air permenbility be big, filtering accuracy is high, little, the advantage of long service life drops in pressure；
The non-weaving cloth of the present invention carries out blending using trefoil fiber and circular fiber, makes full use of the abnormity of trefoil fiber
Structure, increases interfibrous contact area, creates more spaces compared with typical round fiber, improves bicomponent nonwoven
Porosity, increased the probability collided between fiber and microgranule, so as to improve the filter capacity of non-weaving cloth；
Currently preferred non-weaving cloth, the aperture of ground floor fibre web and second layer fibre web is defined, ground floor fibre web
For crude fibre, large aperture, second layer fiber is fine fibre, aperture Jing, adopts ground floor fibre web for water entering surface, the second layer during use
Fibre web is the water surface, and so as to define the non-weaving cloth of different gradient-structures, the crude fibre of wherein ground floor fibre web is played well
Structural support effect, its larger aperture traps particle diameter larger microgranule while smaller resistance is provided；And the second layer is fine
The aperture of net is less, and the less microgranule of particle diameter to flowing into non-weaving cloth carries out secondary interception so that entirely non-weaving cloth is turbid
Degree clearance is more than 95%；
Tack temperature is set in the molten of COPET and PET during hot blast adhesion by the preparation method of the non-weaving cloth of the present invention
Between point, the selection of the temperature conditionss causes low melting point COPET material molten to play cementation in viscosity flow state, and fusing point compared with
Generating state does not change high PET, while fibre structure and degree of crystallinity integrity is ensured, plays skeleton function；And
COPET fibers are evenly distributed in coarse-fibred inside, not only act as adhesive effect, moreover it is possible to be subdivided into original larger hole
More small hole, so as to improve the filtering accuracy of non-weaving cloth；And the preparation method energy shape of the non-weaving cloth of the present invention
The three-dimensional space network structure that is uniformly distributed, the structure are conducive to liquid, gas to pass through, and maintain preferable pressure reduction special
Property, so as to improve its service life.
Specific embodiment
It is an object of the invention to provide, it is achieved through the following technical solutions：
A kind of water filtration bi-component gradient-structure non-weaving cloth, it is characterised in that：By the ground floor fibre web that is bonded together and
Second layer fibre web composition, wherein ground floor fibre web and the second layer fibre web trilobal PET filament fiber and circle by different fineness
Shape COPET filament fiber is constituted；The line density of trilobal PET filament fiber be 2 ~ 6D, account for each layer fibre web mass ratio be 70 ~
95%, the line density of circular COPET filament fibers is 1 ~ 4D.
Preferably, aperture is 10 ~ 200 μm, and grammes per square metre is 70 ~ 200g/m2, thickness is 0.3 ~ 1.6mm.
Preferably, the weight ratio that ground floor fibre web accounts for water filtration bi-component gradient-structure non-weaving cloth is 40 ~ 80%.
Preferably, in ground floor fibre web, the line density of trilobal PET filament fiber is more than trilobal PET in second layer fibre web
The line density of filament fiber, in second layer fibre web, the line density of circle COPET filament fibers is more than or equal to circle in second layer fibre web
The line density of shape COPET filament fiber.
It is further preferred that be made up of the ground floor fibre web and second layer fibre web that are bonded together, by what is be bonded together
Ground floor fibre web and second layer fibre web composition, wherein ground floor fibre web are by the trilobal PET filament fiber and line that line density is 3D
Circular COPET filament fiber composition of the density for 1.8D, and trilobal PET filament fiber accounts for the 86% of ground floor web quality；
Second layer fibre web is by the circular COPET filament fibers that the trilobal PET filament fiber and line density that line density is 2.5D is 1.5D
Composition, and trilobal PET filament fiber accounts for the 83% of second layer web quality, and pore diameter range is 10 ~ 200 μm, and grammes per square metre scope is
140g/m2, thickness is 0.55mm, and it is 75% that ground floor fibre web accounts for the weight ratio of water filtration bi-component gradient-structure non-weaving cloth.
Present invention additionally comprises the water filtration preparation method of bi-component gradient-structure non-weaving cloth, comprises the following steps：
1. will be PET and COPET pre-crystallized, it is dried after section, obtains PET sections and COPET cuts into slices；
2. by step 1. gained PET sections and COPET sections by first group of filament spinning component carry out melting overstocked, spinning, cooling,
Traction and sub-wire lapping, obtain ground floor fibre web；
3. by step 1. gained PET sections and COPET sections by second group of filament spinning component carry out melting overstocked, spinning, cooling,
Traction and sub-wire lapping, obtain second layer fibre web；
4. by step 3. gained second layer fibre web be laid in step 2. gained ground floor fibre web on, superposition obtain composite web, so
Composite web is obtained Jing after hot blast adhesion water filtration bi-component gradient-structure non-weaving cloth afterwards；Wherein hot blast temperature exists
Between COPET and the fusing point of PET.
Preferably, the fusing point of PET sections is 260 ~ 265 DEG C, and the fusing point of COPET sections is 160 ~ 240 DEG C.
Preferably, the temperature of hot blast adhesion is 160 ~ 255 DEG C.
The invention also discloses application of the water filtration with bi-component gradient-structure non-weaving cloth, fixed through impressing, glued heat
Tubular or flat liquid filter cartridge are made after type.
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of water filtration bi-component gradient-structure non-weaving cloth, by the ground floor fibre web and second layer fibre web group that are bonded together
Into wherein ground floor fibre web is fine for the circular COPET long filaments of 4D for the trilobal PET filament fiber and line density of 6D by line density
Dimension composition, and trilobal PET filament fiber accounts for the 70% of ground floor web quality；Second layer fibre web is the three of 2D by line density
Leaf PET filament fibers and line density are constituted for the circular COPET filament fibers of 1D, and trilobal PET filament fiber accounts for the
The 70% of two layers of web quality.
Embodiment 2
A kind of water filtration bi-component gradient-structure non-weaving cloth, by the ground floor fibre web and second layer fibre web group that are bonded together
Into wherein ground floor fibre web is fine for the circular COPET long filaments of 1D for the trilobal PET filament fiber and line density of 6D by line density
Dimension composition, and trilobal PET filament fiber accounts for the 95% of ground floor web quality；Second layer fibre web is the three of 6D by line density
Leaf PET filament fibers and line density are constituted for the circular COPET filament fibers of 4D, and trilobal PET filament fiber accounts for the
The 95% of two layers of web quality.
Embodiment 3
A kind of water filtration bi-component gradient-structure non-weaving cloth, by the ground floor fibre web and second layer fibre web group that are bonded together
Into wherein ground floor fibre web is fine for the circular COPET long filaments of 1D for the trilobal PET filament fiber and line density of 4D by line density
Dimension composition, and trilobal PET filament fiber accounts for the 95% of ground floor web quality；Second layer fibre web is the three of 5D by line density
Leaf PET filament fibers and line density are constituted for the circular COPET filament fibers of 3D, and trilobal PET filament fiber accounts for the
The 80% of two layers of web quality.
Embodiment 4
A kind of water filtration bi-component gradient-structure non-weaving cloth, by the ground floor fibre web and second layer fibre web group that are bonded together
Into wherein ground floor fibre web is fine for the circular COPET long filaments of 4D for the trilobal PET filament fiber and line density of 6D by line density
Dimension composition, and trilobal PET filament fiber accounts for the 70% of ground floor web quality；Second layer fibre web is the three of 2D by line density
Leaf PET filament fibers and line density are constituted for the circular COPET filament fibers of 1D, and trilobal PET filament fiber accounts for the
The 70% of two layers of web quality.
Embodiment 5
A kind of water filtration bi-component gradient-structure non-weaving cloth, by the ground floor fibre web and second layer fibre web group that are bonded together
Into wherein ground floor fibre web is fine for the circular COPET long filaments of 4D for the trilobal PET filament fiber and line density of 6D by line density
Dimension composition, and trilobal PET filament fiber accounts for the 70% of ground floor web quality；Second layer fibre web is the three of 2D by line density
Leaf PET filament fibers and line density are constituted for the circular COPET filament fibers of 1D, and trilobal PET filament fiber accounts for the
The 70% of two layers of web quality, pore diameter range are 10 ~ 200 μm, and grammes per square metre scope is 70g/m2, thickness is 0.3mm, ground floor fibre web
The weight ratio for accounting for water filtration bi-component gradient-structure non-weaving cloth is 40%.
Embodiment 6
A kind of water filtration bi-component gradient-structure non-weaving cloth, by the ground floor fibre web and second layer fibre web group that are bonded together
Into wherein ground floor fibre web is fine for the circular COPET long filaments of 1D for the trilobal PET filament fiber and line density of 6D by line density
Dimension composition, and trilobal PET filament fiber accounts for the 95% of ground floor web quality；Second layer fibre web is the three of 6D by line density
Leaf PET filament fibers and line density are constituted for the circular COPET filament fibers of 4D, and trilobal PET filament fiber accounts for the
The 95% of two layers of web quality, pore diameter range are 10 ~ 200 μm, and grammes per square metre scope is 200g/m2, thickness is 1.6mm, ground floor fibre web
The weight ratio for accounting for water filtration bi-component gradient-structure non-weaving cloth is 80%.
Embodiment 7
A kind of water filtration bi-component gradient-structure non-weaving cloth, by the ground floor fibre web and second layer fibre web group that are bonded together
Into wherein ground floor fibre web is by the circular COPET length that the trilobal PET filament fiber and line density that line density is 3.5D is 1.6D
Silk fiber is constituted, and trilobal PET filament fiber accounts for the 82% of ground floor web quality；Second layer fibre web by line density is
The trilobal PET filament fiber of 2.8D and line density are constituted for the circular COPET filament fibers of 1.2D, and trilobal PET length
Silk fiber accounts for the 75% of second layer web quality, and pore diameter range is 10 ~ 200 μm, and grammes per square metre scope is 180g/m2, thickness is
0.75mm, it is 75% that ground floor fibre web accounts for the weight ratio of water filtration bi-component gradient-structure non-weaving cloth.
Embodiment 8
A kind of water filtration bi-component gradient-structure non-weaving cloth, by the ground floor fibre web and second layer fibre web group that are bonded together
Into wherein ground floor fibre web is by the circular COPET length that the trilobal PET filament fiber and line density that line density is 3.5D is 1.5D
Silk fiber is constituted, and trilobal PET filament fiber accounts for the 80% of ground floor web quality；Second layer fibre web by line density is
The trilobal PET filament fiber of 2.2D and line density are constituted for the circular COPET filament fibers of 1.2D, and trilobal PET length
Silk fiber accounts for the 85% of second layer web quality, and pore diameter range is 10 ~ 200 μm, and grammes per square metre scope is 100g/m2, thickness is
0.23mm, it is 75% that ground floor fibre web accounts for the weight ratio of water filtration bi-component gradient-structure non-weaving cloth.
Embodiment 9
A kind of water filtration bi-component gradient-structure non-weaving cloth,
It is made up of the ground floor fibre web and second layer fibre web that are bonded together, wherein ground floor fibre web is by the SANYE that line density is 3D
Shape PET filament fiber and line density are constituted for the circular COPET filament fibers of 1.8D, and trilobal PET filament fiber accounts for the
The 86% of one layer of web quality；Second layer fibre web is by the trilobal PET filament fiber and line density that line density is 2.5D for 1.5D's
Circular COPET filament fibers composition, and trilobal PET filament fiber accounts for the 83% of second layer web quality, and pore diameter range is 10
~ 200 μm, grammes per square metre scope is 140g/m2, thickness is 0.55mm, and ground floor fibre web accounts for that water filtration bi-component gradient-structure is non-to be knitted
The weight ratio for making cloth is 75%.
Embodiment 10
The water filtration of embodiment 1 preparation method of bi-component gradient-structure non-weaving cloth, comprises the following steps：
1. will be PET and COPET pre-crystallized, it is dried after section, obtains PET sections and COPET cuts into slices；
2. by step 1. gained PET sections and COPET sections by first group of filament spinning component carry out melting overstocked, spinning, cooling,
Traction and sub-wire lapping, obtain ground floor fibre web；
3. by step 1. gained PET sections and COPET sections by second group of filament spinning component carry out melting overstocked, spinning, cooling,
Traction and sub-wire lapping, obtain second layer fibre web；
4. by step 3. gained second layer fibre web be laid in step 2. gained ground floor fibre web on, superposition obtain composite web, so
Composite web is obtained Jing after hot blast adhesion water filtration bi-component gradient-structure non-weaving cloth afterwards；Wherein hot blast temperature is 160
℃。
Preparation method reference implementation example 10 of the water filtration of embodiment 2 ~ 9 with bi-component gradient-structure non-weaving cloth, hot blast
Temperature is between COPET and the fusing point of PET.
Comparative example 1
To fully be dried through pre-crystallized PET sections；Then, by the melting of filament spinning component overstock, spinning, cooling, drawing-off
With sub-wire lapping, most after Jing flower roller hot-rolling mills in 220 DEG C/205 DEG C of temperature, hot pressing under the conditions of line pressure 80N is obtained.Fiber is
PET circular shaped filaments fibers, its line density are 2D.The grammes per square metre of made one-component non-weaving cloth is 140g/m2, thickness is
0.47mm.Water filtration filter element is made in the cutting of one pack system non-weaving cloth, folding and sizing.
Water filtration to embodiment 1 ~ 9 detects that with bi-component gradient-structure non-weaving cloth concrete testing standard is thickness
Degree test is using GB/T3820-1997 standards；Permeability test adopts ASTM D737 standards；Ultimate strength and extension at break are adopted
With 4595 testing standards of ASTMD；Filter element filtering performance test, with reference to GB/T18853-2002, carrier is water；Opening size test is adopted
With platen press is steeped, property indices are as shown in table 1.
The testing result of the non-weaving cloth of 1 embodiment 1 ~ 9 of table
Embodiment 9 be can be seen that by the test result of table 1 to compare with comparative example 1, under the conditions of same grammes per square metre is 140g/m2, this
The bi-component gradient-structure non-weaving cloth of invention rolls the ultimate strength and extension at break of a non-weaving cloth than traditional PET circular shaped filaments
There is large increase, and air penetrability is the twice of traditional method non-weaving cloth, thickness is nearly the one of traditional method non-weaving cloth
Times, it means that under identical working condition, the present invention bi-component gradient-structure non-weaving cloth ensure big permeable amount while,
Water carrier flow and contact area are increased, that is, pressure drop are less under same working environment, filter effect is also more preferable,
Therefore the turbidity removal rate under equal conditions improves 30% compared with comparative example 1.
Bubble platen press opening size test shows that the minimum-value aperture of prepared 140g double-component non-weaving cloth filter materials is in embodiment 9
19 μm, and aperture size is distributed in 19-101 μm, and most probable pore size is 58 μm, structure distribution, filters filter element for water in gradient
The multistage filtering to sizes microgranule is capable of achieving, filtration efficiency, the purpose of multistage filtering is capable of achieving.Prepared by comparative example 1
It is 26 μm that PET circular shaped filaments roll the minimum-value aperture of a non-weaving cloth, big compared with product in embodiment 1, and aperture size integrated distribution
At 26 μm or so, maximum diameter of hole is only 51 μm, and aperture size span is non-woven much smaller than many gradients of double-component prepared by embodiment 1
Cloth, this traditional single structure filtering material can cause most of particulate matter to be intercepted at the table of filtering layer in filter process
Face, thus top layer hole is easy to be filled and its internal voids, the pressure drop in filter process is rapid to be risen so that filter material without
Method gives full play to effectiveness and then reduces the service life of filter material.
Pressure drop result shows that the three times that embodiment 9 is reached the time required to same pressure drops for the comparative example time are more, I
Can be inferred that the service life of double-component nonwoven filter prepared by embodiment 9 is that typical round long filament is non-in comparative example 1
3 times of weaving filter material, the water filtration bi-component gradient-structure non-weaving cloth of the application has longer service life.
Claims (9)
1. a kind of water filtration bi-component gradient-structure non-weaving cloth, it is characterised in that：By the ground floor fibre web being bonded together
Constitute with second layer fibre web, wherein ground floor fibre web and second layer fibre web by different fineness trilobal PET filament fiber and
Circular COPET filament fibers composition；The line density of trilobal PET filament fiber be 2 ~ 6D, account for each layer fibre web mass ratio be 70 ~
95%, the line density of circular COPET filament fibers is 1 ~ 4D.
2. water filtration according to claim 1 bi-component gradient-structure non-weaving cloth, it is characterised in that：Aperture be 10 ~
200 μm, grammes per square metre is 70 ~ 200g/m2, thickness is 0.3 ~ 1.6mm.
3. water filtration according to claim 1 bi-component gradient-structure non-weaving cloth, it is characterised in that：Ground floor fibre web
The weight ratio for accounting for water filtration bi-component gradient-structure non-weaving cloth is 40 ~ 80%.
4. water filtration according to claim 1 bi-component gradient-structure non-weaving cloth, it is characterised in that：Ground floor fibre web
Line density of the line density of middle trilobal PET filament fiber more than trilobal PET filament fiber in second layer fibre web, the second layer are fine
Line density of the line density of circle COPET filament fibers more than or equal to circle COPET filament fibers in second layer fibre web in net.
5. water filtration according to claim 1 bi-component gradient-structure non-weaving cloth, it is characterised in that：By being bonded in one
The ground floor fibre web for rising and second layer fibre web composition, are made up of the ground floor fibre web and second layer fibre web that are bonded together, wherein
Ground floor fibre web is by the circular COPET filament fibers group that the trilobal PET filament fiber and line density that line density is 3D is 1.8D
Into, and trilobal PET filament fiber accounts for the 86% of ground floor web quality；Second layer fibre web is by the SANYE that line density is 2.5D
Shape PET filament fiber and line density are constituted for the circular COPET filament fibers of 1.5D, and trilobal PET filament fiber accounts for the
The 83% of two layers of web quality, pore diameter range are 10 ~ 200 μm, and grammes per square metre scope is 140g/m2, thickness is 0.55mm, and ground floor is fine
It is 75% that net accounts for the weight ratio of water filtration bi-component gradient-structure non-weaving cloth.
6. preparation method of the water filtration described in claim 1 with bi-component gradient-structure non-weaving cloth, it is characterised in that：Including
Following steps：
1. will be PET and COPET pre-crystallized, it is dried after section, obtains PET sections and COPET cuts into slices；
2. by step 1. gained PET sections and COPET sections by first group of filament spinning component carry out melting overstocked, spinning, cooling,
Traction and sub-wire lapping, obtain ground floor fibre web；
3. by step 1. gained PET sections and COPET sections by second group of filament spinning component carry out melting overstocked, spinning, cooling,
Traction and sub-wire lapping, obtain second layer fibre web；
4. by step 3. gained second layer fibre web be laid in step 2. gained ground floor fibre web on, superposition obtain composite web, so
Composite web is obtained Jing after hot blast adhesion water filtration bi-component gradient-structure non-weaving cloth afterwards；Wherein hot blast temperature exists
Between COPET and the fusing point of PET.
7. preparation method of the water filtration according to claim 6 with bi-component gradient-structure non-weaving cloth, it is characterised in that：
The fusing point of PET sections is 260 ~ 265 DEG C, and the fusing point of COPET sections is 160 ~ 240 DEG C.
8. preparation method of the water filtration according to claim 7 with bi-component gradient-structure non-weaving cloth, it is characterised in that：
Step 4. middle hot blast adhesion temperature be 160 ~ 255 DEG C.
9. application of the water filtration described in claim 1 with bi-component gradient-structure non-weaving cloth, it is characterised in that：Through pressure
Tubular or flat liquid filter cartridge are made after print, glued thermal finalization.
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| CN111020876A (en) * | 2019-12-30 | 2020-04-17 | 南通大学 | High-efficiency filtering material with gradient structure and production method thereof |
| CN113026213A (en) * | 2021-03-02 | 2021-06-25 | 佛山市南海中邦无纺有限公司 | Gradient fiber non-woven fabric and spinning equipment and manufacturing method thereof |
| CN114517356A (en) * | 2021-12-31 | 2022-05-20 | 大连华阳百科科技有限公司 | Bi-component non-woven fabric for filtration and preparation method thereof |
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